To be honest, and maybe it's just me, but I wouldn't really classify any of those (Mai-hime, Simoun, KnM) as real "sci-fi" - even though there are mechanical elements, they're really just stand-ins for magic or mythology. They're more of what I'd call "fantasy".
A really hard science fiction yuri anime? Geez, let me think...Mouretsu Pirates might count. Not really "hard" SF, but there are no supernatural elements at least. Kiddy Grade's a borderline case, still kind of "magic superpowers", but a good show, certainly. Blue Drop is definitely a good, if sad, example.
yes, you are right,
i prefer pure sci-fi, like blue drop (why sad?), but there are few, most are only anime, while i want to read, then i can be satisfy with a good fantasy too,
i read venus versus virus, and it was good, if we don't count the bad ending (and it's a false yuri too !)
i'll look for your advice too, thanks
post edit: an other example of what i'm looking for is aria (i know is not yuri)
i saw now that KG is an anime too, like bodacious pirates, and, from my experience, manga from anime aren't good
last edited at Jun 8, 2013 6:13AM